Global ETD Search
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Showing 1 to 10 of 10 for “"evolution of sociality"”.
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Population Genomics of Polistes Wasps
The molecular mechanisms influencing the evolution of social behaviour in insects are of great interest and have been the focus of many recent studies. Chapter one of this thesis reviews several major hypotheses regarding the evolution of sociality. Chapter two outlines the methodological steps …
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Neurochemical Levels Correlate with Population Level Differences in Social Structure and Individual Behavior in the Polyphenic Spider, <em>Anelosimus studiosus</em>.
… this species and possible implications for the evolution of sociality. Octopamine is a neurotransmitter that has been found to elevate aggression in invertebrates. Serotonin has been shown, in some cases, to interact antagonistically with octopamine. We used High Pressure Liquid Chromatography …
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Mechanisms involved in eusocial evolution in bees
A major challenge in evolutionary biology is to understand the origin and maintenance of complex animal societies. Identifying the mechanisms involved in transitions from solitary to group living can shed light on the evolutionary processes through which sociality arises. Bees are a valuable group …
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Cooperation And Competition In Paper Wasp And Human Societies
… animal literature, to investigate the effect of different types of competition on cooperation among members of a social group. These lines of research are complementary and mutually reinforcing: drawing on approaches developed to analyze the behavior of one taxon to investigate another can …
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The evolution of social traits and biodiversity in the ants.
Cooperation has shaped the evolution of life on Earth. The ants are the most numerically diverse of the eusocial Hymenoptera, and display wide variation in social complexity. This positions the ants as an ideal taxon in which to study social evolution in a comparative framework. Social evolution …
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Comparative Physiological and Genomic Analyses of Division of Labor in Honey Bees and Paper Wasps
… aimed at understanding the mechanisms and evolution of sociality in colony-forming insects. I first summarize a conceptual framework for the study of social behavior inspired by the field of evolutionary developmental biology (""evo-devo""); I suggest complex social behavior evolves via …
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Evolutionary Origin and Maintenance of Sociality in the Small Carpenter Bees
… and mutual tolerance, yet there are few examples of social behaviour in this phylum. The small carpenter bees, genus Ceratina, provide important insights into the early stages of sociality. I described the biology and social behaviour of five facultatively social species which exhibit all of the …
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An emerging role for tcf7l2 at the nexus between metabolic regulation and social behavior
… disorder, and depression. Interestingly, many of these disorders also have a major metabolic component and several lines of data suggest an integral link between stress, brain metabolism, and plasticity of the adult brain. Our goal is to investigate the molecular basis of that link, focused on …
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Molecular Evidence Suggests Multiple Evolutionary Origins of Sociality in the Polyphenic Spider <em>Anelosimus studiosus</em> (Araneae: Theridiidae).
… latitudes. This study examines the origins of the social phenotype within a segment of the spider's range. Two hypotheses are tested: 1) pockets of social behavior represent a single origin or 2) pockets of social behavior represent local evolutions, thus leading to multiple origins of …
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Sociality in the common mole-rat, Cryptomys hottentotus hottentotus : the effects of aridity
… the extrinsic factors which have shaped the evolution and maintenance of sociality in the African mole-rats. Specifically, the common mole-rat was used as a model to assess the Aridity Food-Distribution Hypothesis (AFDH), as an explanation for the evolution of bathyergid sociality. The AFDH …